barak.utilities.poisson_noise¶

barak.utilities.poisson_noise(nflux, nsigma, seed=None)[source]¶

Adds poisson noise to a normalised flux array.

Parameters :	nsigma : float One sigma error in the flux at the continuum level (where normalised flux=1). nflux : array of floats, shape (N,) Normalised flux values (i.e. flux values divided by the continuum). seed : int, optional If given, this is used to seed the random number generator.
Returns :	flux, error : arrays of floats, shape (N,) flux with noise added and one sigma error array.